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50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* tupconvert.h
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* Tuple conversion support.
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*
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*
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* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/access/tupconvert.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef TUPCONVERT_H
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#define TUPCONVERT_H
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#include "access/attmap.h"
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#include "access/htup.h"
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#include "access/tupdesc.h"
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#include "executor/tuptable.h"
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typedef struct TupleConversionMap
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{
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TupleDesc indesc; /* tupdesc for source rowtype */
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TupleDesc outdesc; /* tupdesc for result rowtype */
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AttrMap *attrMap; /* indexes of input fields, or 0 for null */
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Datum *invalues; /* workspace for deconstructing source */
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bool *inisnull;
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Datum *outvalues; /* workspace for constructing result */
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bool *outisnull;
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} TupleConversionMap;
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extern TupleConversionMap *convert_tuples_by_position(TupleDesc indesc,
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TupleDesc outdesc,
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const char *msg);
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extern TupleConversionMap *convert_tuples_by_name(TupleDesc indesc,
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TupleDesc outdesc);
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extern HeapTuple execute_attr_map_tuple(HeapTuple tuple, TupleConversionMap *map);
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extern TupleTableSlot *execute_attr_map_slot(AttrMap *attrMap,
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TupleTableSlot *in_slot,
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TupleTableSlot *out_slot);
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extern void free_conversion_map(TupleConversionMap *map);
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#endif /* TUPCONVERT_H */
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